Even President Barack Obama's $1 billion re-election team is hinting that Pennsylvania voters appear likely to support GOP nominee Mitt Romney. According to excerpts of Obama campaign conference calls, its team has been told to avoid showing panic on Election Day.

Cutter said on CNN that, "Pennsylvania has tightened, absolutely. If I were working on the Romney campaign, I would probably be giving it a shot too."

According to Politico, "earlier Monday, former President Bill Clinton campaigned in Pennsylvania on Obama's behalf. Polls have shown Obama with an edge, but with Mitt Romney gaining in the chase for the Keystone State’s 20 electoral votes."

Cutter added, "President Clinton has traveled through every single battleground state for us. We are enormously thankful. But we’re not taking anything for granted."